Joshua bbiggs



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TO ALL WHOM IT MAY CONCERN:

Be it known that I, JOSHUA BRIGGS, of Ieterboro, in the county of Hillsboro, and State of New Hampshire, have invented an Improvement in Piano-Forte Stools; and I do hereby declare that the following, taken in con neetion with the drawings which accompany and form part of this specification, is a description of my invention suieient to venable those Skilled in the art to practise it. i

The invention relates to the construction of pianoforte stools, with reference to combining strength and durability, with provision for separation into parts for the purpose ot` eompactiug stools for transportation.

United States Letters Patent were granted to me on the 23d of October, 1866,1for certain improvements in auch stools, and my present improvements have reference to the same general object sought in my previous construction.

The drawings represent a stool embodying my present improvements, A. showing the saine partly `in elevationand partlyiin sectionand B across-section on the line x so.

a denotes the pillar, mounted 'on feet or legs, and receiving the screw-Spindler, which is surmounted by the seat d. In applying the'seat to the spindle, the connection is made through a cap Vor-platc, c, whichjs screwed to the under side of the seat, the spindle and cap being generally permanently connected by a pin or rivet, driven through the hub of the cap, and into orthrough the spindle, the hub being iirst driven down over the top of the spindle. This' means of connection of the spindle and cap-plate is objectionable, in that it is impossible to take the spindle and cap apart and put them together without the aid of a machinist, band is as impossible to drive the cap down upon the spindle in such manner as to have the seat always stand atlright angles to the spindle. To obviate this, I turn the upper end ofthe spindle to a true cylinder, and bore the hub.

out correspondingly, or to just t over the same, and dovn upon a shoulder on the spindle, and then connect the cap and spindle by a set-screw, in such manner that the spindle may be removed from and applied to the cap at any and all times by ordinary skill, or without the aid of a workman; and this feature constitutes 4one part of my invention; as will he understood by ,inspection of thevview shown at A, wherein the top,f, of the spindle is shown as fitting into the hub or boss g of thecap, and as being confined thereto by a set-screw, 7L, which passes through the hub, and into a recess, z', made in the side of the spindle, the simple turning back of the screw allowing the spindle to be at any tmeremoved, as will be readily understood. The pillar a. is made of Wood, and the metal nut k, in which the spindle turns, is screwed into the top of the pillar, the screw-bolt l, by which the pillar is confined to the base, being rst dropped through the pillar, all asshown in my patent above referred to. In applying the legs or feet to the base, or in connecting the pillar and feet, I use a metal block or socket-piece, m, constructed as follows: Thebloclr is made with four or more main sides or faces, (in correspondence with the number of feet,) and in each of these faces I make a recess, n., with vertical side lips or anges, o, and a bottom sea-t, 2J, and form the connecting end of. each foot to fit into said recess and-rest upon said seat, the lips or ilanges o fitting over vertical projections, q, on the sides ofthe feet.' The top face 1* of the footcomes iush with the top of the block fm, and the bottom face s of the pillar fits down upon and covers all the joints, and holds the feet securely and tightly in place. The block 'm has a broad socltet, t, at

its centre, into which a tail-piece or shank, u, on 'the bottom of the pillar, ts, the bolt Z passing through this Vshank and through the bottom piece v of the block, the head resting on this bottom piece as a scat, when the nut w is screwed up on the bolt and against the bottom surface ofthe block. 'lo conceal the ond of the screw-bolt, I use a eentrepicce, w", having a scrcw-thread fitting upon the bolt-screw, and a recess for containing the boltnut, as shown at A. A dowel-pi-n, e, may project up from one or more ot` the feet into a recess in the bottom of the pillar, to keep the pillar from turning upon thc block m.

It will thus be seen that lche screw-spindle may be readily taken from the seat, the pillar from the block m, and the block from the feet, for the purpose of compactly packing them together, and that all may be as readily put together, without other than the mest ordinary skill, and that,when thus put together, they are all as firmly and immovably connected, (except as to the proper movement of the seat and screw-spindle, .relatively to the pillar and base or the dismemberment of the stool by desigm) asthey would be were the relative parts of the j seat and base made or cast integral, or arranged to have no dismemberment.

I claim, in combination with the pillar and feet, the socket-block m, having rccesces formed with side lips or flanges, o, to t into grooves q in the fcet, und bottomscats, p, between which and the shoulder on the pillar the fcct are securely confined, substantially as described.

Also, the centre-piece w', fitting upon and covering the screw-bolt and nut which confine the pillar to the base, substantially as shown and described.

Also, constructing thc socket-block m 'with a. centre socket, t, into which the tail-piccc of thc pillar fits and is confined, substantially as dcscibed.

Also, making 'the screw-spindle rernovable from the seat,- substantially as set forth.

JOSHUA BRIGGS.

Witnesses:

FRANCIS GOULD, Y L. II. LATIMER. 

